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Finding the Fourth Proportional to 10,878.20, 15,012.78 and 6,163.64

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Solution

The fourth proportional to 10,878.20, 15,012.78 and 6,163.64 is: 8,506.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,878.20 : 15,012.78 = 6,163.64 : x
  2. Step 2: Convert to fraction form
    10,878.20/15,012.78 = 6,163.64/x
  3. Step 3: Cross multiply
    10,878.20x = 15,012.78 × 6,163.64
  4. Step 4: Simplify right side
    10,878.20x = 92,533,371.32
  5. Step 5: Solve for x
    x = 92,533,371.32/10,878.20
  6. Step 6: Final answer
    x = 8,506.31

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.